Expired50% confidenceFactExact time
GPT-5 is the underlying model for Codex and is described as significantly more cost-efficient than alternatives
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
7/2/2026
First Seen
Valid until: 9/30/2026(expired)
Sources
Codex vs Claude Code: An In-Depth Comparison of AI Coding Agents
bilibili中山龙阿介6/12/2026
Related Claims
VerifiedThe Codex desktop client supports selecting the GPT-5.5 model.79% similarUnverifiedGPT-5 Codex may have an edge in mathematical and physics calculations, with soft-body physics deformation effects closer to reality.78% similarUnverifiedGPT 5.5 + Codex was rated the most comprehensive AI coding choice currently available, with the best performance in token usage efficiency and speed.77% similarUnverifiedFor most everyday programming tasks, Opus 4.5 is currently a more practical choice than GPT-5.2 Codex, while GPT-5.2 Codex may be preferred for complex backend logic and cybersecurity domains.77% similar
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